Lumarc DevTools

Converter Tools

JSON to CSV Converter

Convert arrays of JSON objects into CSV for spreadsheets, QA checks and exports.

Processed locally — your data never leaves this browser. Input: JSON array Output: CSV text
JSON array

Processed locally — your data never leaves this browser.

CSV text

Tool discovery

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Convert CSV text with headers into formatted JSON arrays.

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Check whether JSON is valid and see clear syntax errors before using it in code.

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Convert YAML documents into formatted JSON with clear parse errors.

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Example input and output

Rows to CSV

[{"id":1,"name":"Ada"},{"id":2,"name":"Linus"}]
id,name
1,Ada
2,Linus

How to use JSON to CSV Converter

Paste or enter your json array, adjust any options, then run the tool. The result appears in the output panel where you can copy or download it.

Related guides

What this tool does

The JSON to CSV Converter accepts a JSON array of objects and writes a CSV table using the union of object keys as headers. It is free to use and designed for technical workflows where pasted data should stay private.

Common use cases

  • Create spreadsheet exports
  • Inspect API records in rows
  • Prepare QA sample data

Privacy and security

Processed locally — your data never leaves this browser. Lumarc DevTools does not include a backend, account system or hidden analytics in this initial release.

Limitations

  • Nested arrays and objects cannot become relational tables automatically.

Frequently asked questions

What JSON shape works best?

Use an array of objects. Nested objects are serialized as JSON strings in CSV cells.